本论文主要研究了基于变换域上的两个图像处理技术，即数字水印技术和图像压缩技术。

In the dissertation, we study two technologies of image processing based on frequency domain. The one is on digital watermarking, the other is on image compressing.

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采用了事件驱动的多线程机制实现音频处理和多路混音，并在压缩域实现四画面和成。

The paper adopts the mechanism of event-driving multi-procedure to realize voice-frequency processing and multichannel mixing. It also achieves f…

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结论在压缩域进行遥感图像处理，不但可简化运算，减少运算量，而且可使处理速度大大提高。

Conclusion It indicates that not only simpler operation and smaller calculation are obtained but also the processing speed is improved greatly.

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